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人教2003课标版《Learning about Language》优质课教案下载
The difference between the Present Perfect Continuous Tense and the Present Perfect Tense.
Difficult and important points:
The difference between the Present Perfect Continuous Tense and the Present Perfect Tense.
Teaching procedures:
Step1 Leading- in
Ask the Ss to study example sentences and try to discover the usage and structures of the Present Perfect Tense.
2. Revise the Present Perfect Tense
现在完成时:
1). 构成：have/has +过去分词 ，has用于第三人称单数， 其他人称用have 。
2). 用法：表示过去发生的某一动作对现在造成的影响或结果。
e.g. 我从1975年起就学英语。
I have studied English since 1975.
自12世纪以来, 中国就使用彩色印刷了。
They have done color printing in China since the 12th century.
Step2 Presentation
Ask the Ss to study another group of example sentences and try to discover the usage and structures of the Present Perfect Continuous Tense.
Present and learn the Present Perfect Continuous Tense
现在完成进行时:
a. 构成：have/has＋been＋现在分词（doing）
b. 用法：
1) 强调动作的持续性。 表示动作从过去某时开始，一直延续到现在，还可能延续下去。如：
①I have been waiting for an hour，but she hasn't come yet.
我等了一个小时了，但是她还没来。
②Tom has been working hard since the new term began.
从新学期开始，汤姆一直在努力学习。